%x1 = 12x^4 + x^2 + 1 = [1 0 1 0 12]
%x2 = 2x^3 + 8x^2 + 7x + 5 = [5 7 8 2]

res = polinom_mult(4, [1 0 1 0 12], 3, [5 7 8 2]);

res = polinom_mult(2, [1 0 1], 1, [0 1]);